Rate your O.B. and get $5 SDM coupon to spend on almost anything in store (through save.ca):
https://twitter.com/ob_Canada/status/509718457920008192
http://www.giveusoneperiod.ca/
Click on "Add a review" and rate that.
P.S. It's a high value coupon which, quite possible, can give you some awesome stuff for free.